Journal-box for dredging or like machinery



(NoModel') A. W. ROBINSON.

JOURNAL BOX FR DREDGIN'G 0R ALIKE MACHINERY. No.'523,40'7. Patented July 24, 1894.

' NVENTOR w1TNEssEs1 NgrTE TT'ESZ ARTHUR W. ROBINSON, OF MILWAUKEE, WISCONSIN.

JOURNALBOX FOR` DREDGING OR LIKE MACHINERY.

SPECIFICATION forming part of Letters Patent No. 523,407, dated July 24, 1894. I

Application tiled November 23, 1893. Serial No. 491.750. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR W. ROBINSON, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Journal- Boxes for Dredging or Like Machinery, of which the following is a specification.

My invention relates to improvements in journal boxes for dredging and like machinery, in which strains are liable to occur which somewhat distort the apparatus, and in which also it is desirable-'to reduce as much as possible the size and Weight of all of the parts.

In the drawings hereof, I illustrate the invention as employed in the construction of a bucket carrier on an excavatororlike machine.

In the drawings: Figure l, illustrates an elevation--partsbeing in section--of the mechanism.- Fig. 2, illustrates an endwise elevation of the journal box, shown as in place in one of the beams of the carrier.

A, A are the side beams of the boom,which supports the chain of buckets.

B is one of the buckets.

O, O, C, C are the links connecting the buckets together.

D, D are castings attached tothe under side of the buckets by bolts E, E, dac., to which the links are pivoted by cross bolts F, F. The links during their movement are supported on wheels or rollers G, G, each pair of which are fastened to a cross shaft H. These shafts are supported upon the side beams A, A and are journaled in journal boxes I,-I, which latter are the subject of this invention. These boxes consist of a casting made all in one piece and which is bored out longitudinally, as at K, to fit the journal ofthe shaft. The boxes are closed at one end to exclude dirt and they are squared on `their under side and` The chamber Q, beneath the lid is a receptacle for lubricating material and a hole or passageway R connects it with the interior of the bearing surface of the box.

It will .be particularly noted that not only are my boxes made in a single casting, but also that about one half of. it and preferably more than one half of it longitudinally is free from projecting surfaces, the sides being substantially parallel and of as small total diameter as may be. This is so that the hole through the webs of the beams in which they are very largely located may be as small as possible,

^ beams A at one place only and adapted to rock in either direction on that point, no such difficulty can arise, because the boxes will automatically adj ust themselves to any deviations from the normal relations of the beams, by rocking on the edges thereof, on which they are supported. I prefer that the grooves which receive the edge of the beam or equivalent support should be somewhat Wider than the edge, so that a rocking motion in a horizontal plane, as well as in a vertical plane may be permitted without jamming.

Among the advantages, which I secure are: exceedingly low cost; durability,because frictional wear on the parts is largely reduced, and because there are no vmoving parts to the boxes; easy replacement when a box is Worn out or broken; reduced power required to drive the machine; great reduction in the amount of breakage; freedom from loss of parts; adaptability to practically all positions in which gravity will tend to the support of the bearing, and finally, no special provision on the beams which support the bearings are IOO in combination with a beam for supporting the box, the edge of which' enters between said ribs, substantially as set forth,

Signed at Milwaukee, in the county of Mil- 15 Waukee and State of Wisconsin, this 8th day ot November, A. D. 1893.

ARTHUR W. ROBINSON.

Witnesses:

JOHN C. WILLIAMS, J. G. DAVIEs. 

